The Gillard government's proposed whistleblower protection laws are weak, ill-defined and will need to be amended if government agencies are to become more transparent and accountable, according to whistleblowing experts.

Attorney-General Mark Dreyfus introduced the long-awaited Public Interest Disclosure Bill into the lower house last week. While applauding the government's commitment to make public interest whistleblowing legal for the first time, Dr A.J Brown, professor of public policy and law at Griffith University, says there are "serious problems" with the legislation that must be fixed.